Alright, let's work through 5143 times 2649 step by step
5143 × 2649 = 2649 × (5143)
+ 2649 × 3 what gives us 7947
+ 2649 × 40 producing 105960
+ 2649 × 100 yielding 264900
+ 2649 × 5000 that is equal 13245000

= 13623807
